Bottle-to-bottle transfer funnel



FIG. 1 is a perspective view of a bottle-to-bottle transfer funnel showing my new design;

FIG. 2 is a side elevational view thereof with a portion shown fragmented and sectioned for illustrative purposes only;

FIG. 3 is a left end elevational view thereof; and

FIG. 4 is a right end elevational view thereof. 

The ornamental design for a bottle-to-bottle transfer funnel, as shown and described. 